--- schema_version: "1" id: 131911b819b6a5db357021013a7467a37fd28556f2048dd176c7427de0d5ceba title: Apache Kafka Connector Release Notes collection: mulesoft version: current locale: ja-jp portal_url: https://docs.salesforce.com/mulesoft/current/ja-jp/release-notes/connector/kafka-connector-release-notes-mule-4.md canonical_url: https://docs.mulesoft.com/jp/release-notes/connector/kafka-connector-release-notes-mule-4 source_site: docs.mulesoft.com content_type: documentation content_hash: 55181c551b0ef245c25072bb695f8acaad0d9245f9f2614d0b03f9395799c39b description: MuleSoft Documentation Site latest: true --- # Apache Kafka Connector Release Notes Support Category: [Select](https://www.salesforce.com/en-us/wp-content/uploads/sites/4/documents/legal/Agreements/versioning-back-support-policy.pdf) Anypoint Connector for Apache Kafka (Kafka Connector) enables you to connect to the Apache Kafka messaging system, enabling seamless integration between your applications and an Apache Kafka cluster. Guide: [Apache Kafka Connector](https://docs.mulesoft.com/kafka-connector/latest/) Reference: [Apache Kafka Connector Reference](https://docs.mulesoft.com/kafka-connector/latest/kafka-connector-reference) ## [](#4-15-4)4.15.4 **October 23, 2026** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0, 3.9.2

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The com.fasterxml.jackson.core:jackson-databind library is upgraded to version 2.22.4 to address reported security vulnerabilities.

W-24605939
## [](#4-15-3)4.15.3 **October 8, 2026** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0, 3.9.2

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The org.xerial.snappy:snappy-java library is upgraded to version 1.1.10.11 to address reported security vulnerabilities.

W-24409903
## [](#4-15-2)4.15.2 **September 29, 2026** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0, 3.9.2

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

Consumed Avro messages that include decimal logical types now render numeric values correctly. To enable this functionality, use the mule.kafka.muleKafkaAvroDeserializer.useLogicalTypeAwareRenderer system property. For more information, see Configure the Confluent Schema Registry in the Kafka Connector Connection.

W-23832785

The io.confluent:kafka-avro-serializer library is upgraded to 7.9.9.

W-23832785

The at.yawk.lz4:lz4-java library is upgraded to 1.11.3.

W-23832785

The com.github.luben:zstd-jni library is upgraded to 1.5.7-18 to address reported security vulnerabilities.

W-24165087

The com.fasterxml.jackson.core:jackson-databind library is upgraded to 2.22.3 to address reported security vulnerabilities.

W-24311523, W-24311522, W-24311518, W-24311520
## [](#4-15-1)4.15.1 **September 4, 2026** ### What’s New - This release includes general security fixes. ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0, 3.9.2

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The Publish operation no longer deadlocks when the connector retries a failed connection.

W-17754401

The connector no longer leaves unused consumer client IDs that continuously attempt to reconnect after the consumer pool unexpectedly closes.

W-22537872
## [](#4-15-0)4.15.0 **August 20, 2026** ### What’s New - This connector version requires Mule runtime 4.6.22 or later if you’re using Mule 4.6.x, or Mule runtime 4.9.9 or later if you’re using Mule 4.9.x. If you prefer not to upgrade your Mule runtime, use the connector version released immediately after this one. - Kafka Connector now supports AWS Identity and Access Management (IAM) authentication for secure connections to Amazon MSK clusters. For more information, see [Consumer SASL/AWS IAM Connection](https://docs.mulesoft.com/kafka-connector/latest/kafka-connector-reference#consumer-sasl-aws-iam) and [Producer SASL/AWS IAM Connection](https://docs.mulesoft.com/kafka-connector/latest/kafka-connector-reference#producer-sasl-aws-iam). For examples, see [Configure AWS IAM Authentication](https://docs.mulesoft.com/kafka-connector/latest/kafka-connector-configure-aws-iam-example). ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0, 3.9.2

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The Batch Message Listener source no longer throws a MULE:EXPRESSION error when using the default redelivery policy.

W-18772894

The at.yawk.lz4:lz4-java library is upgraded to version 1.11.2 to address reported security vulnerabilities.

W-23796448
## [](#4-14-0)4.14.0 **June 12, 2026** ### What’s New - Kafka Connector now supports DataWeave expressions in connection parameters. Expression support applies to the username, password, token ID, token HMAC, client ID, client secret, consumer group ID, and bootstrap servers parameters. ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0, 3.9.2

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The com.fasterxml.jackson.core:jackson-databind component is upgraded to 2.22.0.

W-3300013

The at.yawk.lz4:lz4-java component is upgraded to 1.11.0.

W-3300013

The commons-io:commons-io component is upgraded to 2.22.0.

W-3300013
## [](#4-13-1)4.13.1 **April 25, 2026** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0, 3.9.2

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

Updated Apache Kafka client to version 3.9.2 for enhanced security and stability.

W-22161314
## [](#4-13-0)4.13.0 **March 21, 2026** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

This release includes general security fixes.

W-20953782
## [](#4-12-2)4.12.2 **January 23, 2026** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The connector now includes the secure LZ4 compression library (at.yawk.lz4:lz4-java:1.10.1) as an explicit dependency, ensuring full support for LZ4 compression (compression.type=lz4). This update addresses a security vulnerability (CVE-2025-66566) in the previous LZ4 implementation while maintaining complete functionality for LZ4 compression.

W-20880709
## [](#4-12-1-deprecated)4.12.1 (Deprecated) This version is deprecated. The fixed issues for this version are in version [4.12.2](#4-12-2). **December 21, 2025** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The connector now properly skips certificate validation when the TLS context is configured with insecure=true. Previously, the connector failed with certificate validation errors even when certificate validation was explicitly disabled. The fix implements a custom SSL engine factory that correctly handles the insecure TLS context setting.

W-18214347
## [](#4-12-0)4.12.0 **November 5, 2025** ### What’s New - Kafka Connector now supports deserializing records serialized with Avro schemas. This new functionality enables you to easily integrate your Mule applications with Avro Schema Deserializer. For details, refer to [Configure the Confluent Schema Registry](https://docs.mulesoft.com/kafka-connector/latest/kafka-connector-configure-confluent-example#configure-the-confluent-schema-registry). ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The connector no longer throws a ClassCastException at runtime when attempting to use a custom deserializer, such as KafkaAvroDeserializer, that returns Java objects instead of the required InputStream. To enable Avro deserialization, configure the connector to use the new internal deserializer: MuleKafkaAvroDeserializer.

W-19153642
## [](#4-11-1)4.11.1 **September 24, 2025** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

Upgraded jackson-databind library version from 2.18.3 to 2.20.0.
Upgraded snappy-java library version from 1.1.10.7 to 1.1.10.8.
Upgraded commons-io library version from 2.18.0 to 2.20.0.

W-19688916
## [](#4-11-0)4.11.0 **August 28, 2025** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0, 3.9.1

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

All operations now throw the new KAFKA:SECURITY error.

W-19132680
## [](#4-10-2)4.10.2 **July 23, 2025** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The Kafka client dependency is upgraded to version 3.9.1 to fix the CVE-2025-27817 vulnerability.

W-19063366
## [](#4-10-1)4.10.1 **April 17, 2025** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, 3.7.0, 3.8.0, 3.9.0

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The connector no longer overrides serializers configuration when it is configured in the Additional Properties field for both the Publish and Bulk publish operations.

W-17105037
## [](#4-10-0)4.10.0 **December 19, 2024** ### What’s New - The **Partitioner** field for all connection types in the producer configuration now includes a `NONE` option, which enables the Kafka client to manage the partition strategy. ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, and 3.7.0

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The connector no longer overrides the transaction ID if it is configured in the Additional Properties field in the producer configuration.

W-17105037

The connector now handles Kafka headers with null values properly by converting them to empty byte arrays instead of throwing a NullPointerException error.

W-16167262
## [](#4-9-0)4.9.0 **August 23, 2024** ### What’s New - The **Bulk publish** operation is added to publish multiple messages at the same time. - The custom `MuleKafkaAvroSerializer` property is added to publish messages in Avro format. ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, and 3.7.0

OpenJDK

8, 11, and 17
## [](#4-8-0)4.8.0 **June 18, 2024** ### What’s New - Apache Kafka Connector now supports OAuth2 Client Credentials grant type authentication to integrate seamlessly with OAuth2-compliant authorization servers. Use the **Consumer SASL/OAUTHBEARER - Client Credentials Connection** or **Producer SASL/OAUTHBEARER - Client Credentials Connection** options in the connector configuration. - The consumer and producer connection configurations have a new **Additional properties** field to customize the Kafka connection as you desire. ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, 3.6.1, and 3.7.0

OpenJDK

8, 11, and 17
## [](#4-7-6)4.7.6 **May 31, 2024** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, and 3.6.1

OpenJDK

8, 11, and 17
### Fixed Issues
Issue Resolution ID

The connector performance is now improved when redeploying.

W-15637208
## [](#4-7-5)4.7.5 **February 2, 2024** ### What’s New - This connector is now compatible with Java 17. ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, 3.5.1, and 3.6.1

OpenJDK

8, 11, and 17
## [](#4-7-4)4.7.4 **January 9, 2024** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, 3.4.0, and 3.6.1

OpenJDK

8 and 11
### Fixed Issues
Issue Resolution ID

The Mule application deployment no longer fails when the connector connection test fails.

W-13197433

The Kafka clients library is upgraded to version 3.6.1 to address reported security vulnerabilities.

W-14486778
## [](#4-7-3)4.7.3 **November 29, 2023** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, and 3.4.0

OpenJDK

8 and 11
### Fixed Issues
Issue Resolution ID

Upgraded snappy-java library version from 1.1.8.1 to 1.1.10.4.

W-14486778
## [](#4-7-2)4.7.2 **May 4, 2023** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0, 3.3.2, and 3.4.0

OpenJDK

8 and 11
### Fixed Issues
Issue Resolution ID

Upgraded the Kafka Clients library from org.apache.kafka:kafka-clients:3.3.2 to org.apache.kafka:kafka-clients:3.4.0.

W-12665458
## [](#4-7-1)4.7.1 **March 17, 2023** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0 and 3.3.2

OpenJDK

8 and 11
### Fixed Issues
Issue Resolution ID

Updated the Maximum polling interval field description both in the Studio UI and the Apache Kafka Connector Reference.

W-12660459

Updated internal dependencies.

W-12710406
## [](#4-7-0)4.7.0 **February 13, 2023** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.1, 3.2.0 and 3.3.2

OpenJDK

8 and 11
### Fixed Issues
Issue Resolution ID

Kafka Connector now uses kafka-clients 3.3.2.

W-11554436

The Publish operation now handles AUTHENTICATION_ERROR.

W-12042969

Kafka connector now supports the boolean system property -Dmule.kafka.publish.useNull to be set as true or false, if not set, the default value is false. This allows the Publish operation to send null messages.

W-12150770
## [](#4-6-8)4.6.8 **November 25, 2022** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, and 2.8.1

OpenJDK

8 and 11
### Fixed Issues
Issue Resolution ID

The Kafka record is no longer empty when using the Consume operation more than once without using the Commit operation.

W-11768903

Kafka Connector now throws the expected error when the message body exceeds the maximum topic size.

W-12042969
## [](#4-6-7)4.6.7 **May 30, 2022** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, and 2.8.1

OpenJDK

8 and 11
### Fixed Issues
Issue ID

The connector now displays the correct field names for Default operation poll timeout and Default operation poll timeout time unit.

W-11137428
## [](#4-6-6)4.6.6 **May 5, 2022** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, and 2.8.1

OpenJDK

8 and 11
### Fixed Issues
Issue ID

The Kafka message key is no longer empty when reprocessing messages when the topic contains more than one partition.

W-11048498

The connector no longer throws null pointer exceptions when the message key is null.

W-11090869
## [](#4-6-5)4.6.5 **April 7, 2022** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, and 2.8.1

OpenJDK

8 and 11
### Fixed Issues
Issue ID

The Kafka message key is no longer empty when reprocessing messages.

W-10795597, W-10889605
## [](#4-6-4)4.6.4 **February 4, 2022** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, and 2.8.1

OpenJDK

8 and 11
### Fixed Issues
Issue ID

Reconnection issues caused the Kafka Message Listener to stop consuming messages.

SE-22821, SE-24437
## [](#4-6-3)4.6.3 **February 2, 2022** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, and 2.8.1

OpenJDK

8 and 11
### Fixed Issues
Issue ID

The IsolationLevel parameter was declared but not implemented in the code.

CONN-9887
## [](#4-6-2)4.6.2 **January 4, 2022** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, and 2.8.1

OpenJDK

8 and 11
### Fixed Issues
Issue ID

Kafka Message Listener did not process tombstone messages correctly.

SE-23630

Kafka Message Listener stopped when attempting to consume messages in corner cases.

SE-22821
## [](#4-6-1)4.6.1 **October 27, 2021** ### What’s New - Upgraded the Kafka client library to version 2.8.1. ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, 2.7.0, and 2.8.1

OpenJDK

8 and 11
## [](#4-6-0)4.6.0 **October 19, 2021** ### What’s New - Added the **Consumer SASL/TOKEN Connection** and **Producer SASL/TOKEN Connection** authentication types, which use token delegation to connect to the Kafka cluster. ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
## [](#4-5-7)4.5.7 **September 28, 2021** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
### Fixed Issues
Issue ID

Kafka Connector reconnection did not work when there was an ACL access issue.

SE-22595

Kafka Message Listener did not handle duplicate headers.

SE-22520
## [](#4-5-6)4.5.6 **September 15, 2021** ### Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
### Fixed Issues
Issue ID

The reconnection strategy did not work.

SE-22340
## [](#4-5-5)4.5.5 **July 12, 2021** ### [](#compatibility-37)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
### [](#fixed-issues-32)Fixed Issues - Kafka **Consumer** and **Message Listener** failed after picking one message. (SE-21705) ## [](#4-5-4)4.5.4 **June 11, 2021** ### [](#compatibility-38)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
### [](#fixed-issues-33)Fixed Issues - Kafka **Message Listener** failed to process messages while using IMMEDIATE ACK. (SE-21070) ## [](#4-5-3)4.5.3 **June 8, 2021** ### [](#compatibility-39)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
### [](#fixed-issues-34)Fixed Issues - Kafka Connector was continuously rebalancing the loop when using multiple consumers per partition. (SE-20824) ## [](#4-5-2)4.5.2 **April 8, 2021** ### [](#compatibility-40)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
### [](#fixed-issues-35)Fixed Issues - Payload was null in the Batch component when using the Batch message listener source. (SE-20119) ## [](#4-5-1)4.5.1 **March 19, 2021** ### [](#compatibility-41)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
### [](#fixed-issues-36)Fixed Issues - Performance degraded when using the Publish operation. (SE-20124) - Kafka connector created a new connection every time a producer published a new message. (SE-20003) ## [](#4-5-0)4.5.0 **February 25, 2021** ### [](#compatibility-42)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, 2.6.0, and 2.7.0

OpenJDK

8 and 11
### [](#features)Features Added a new configuration property to Producer connections to enable the selection of a message partition strategy from those provided by the `kafka-clients` library. The message partition strategy is used for routing messages to partitions when a key or a partition is not provided. ### [](#fixed-issues-37)Fixed Issues Fixed the performance degradation issue that occurred when an incorrect key was used to remove closed sessions. (SE-19638) ## [](#4-4-3)4.4.3 **January 29, 2021** ### [](#compatibility-43)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, and 2.7.0

OpenJDK

8 and 11
### [](#fixed-issues-38)Fixed Issues Fixed the Anypoint Studio test connection functionality for producer and consumer connections. ## [](#4-4-2)4.4.2 **January 15, 2021** ### [](#compatibility-44)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0, and 2.7.0

OpenJDK

8 and 11
### [](#features-2)Features Upgraded the Kafka client library to version 2.7.0. ## [](#4-4-1)4.4.1 **January 12, 2021** ### [](#compatibility-45)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0

OpenJDK

8 and 11
### [](#fixed-issues-39)Fixed Issues On Windows, using backslashes as path separators when providing a full path for a keytab file did not work. (SE-15416) ## [](#4-4-0)4.4.0 **November 26, 2020** ### [](#compatibility-46)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0

OpenJDK

8 and 11
### [](#new-features)New Features Added the ability to leverage the manual offset commit option for the **Consume** operation. ### [](#fixed-issues-40)Fixed Issues The manual connector commit inside Mule error handling had no effect. (SE-18605) ## [](#4-3-5)4.3.5 **November 2, 2020** ### [](#compatibility-47)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0

OpenJDK

8 and 11
### [](#fixed-issues-41)Fixed Issues Apache Kafka Connector ignored the values of the **Heartbeat interval** and **Session timeout** fields in the consumer configuration. (SE-18343) ## [](#4-3-4)4.3.4 **October 15, 2020** ### [](#compatibility-48)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0

OpenJDK

8 and 11
### [](#fixed-issues-42)Fixed Issues The issue that caused the Kafka Connector source to fail to reconnect after multiple queue stop events is fixed. (SE-17727) ## [](#4-3-3)4.3.3 **September 18, 2020** ### [](#compatibility-49)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0

OpenJDK

8 and 11
### [](#fixed-issues-43)Fixed Issues The issue that caused Kafka Connector to throw a `KAFKA:COMMIT_FAILED` error when messages took a longer time to process than what was specified in the **Maximum poll interval** parameter is fixed. (SE-17447) ## [](#4-3-2)4.3.2 **July 30, 2020** ### [](#compatibility-50)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0
### [](#fixed-issues-44)Fixed Issues The issue that caused Kafka Connector to throw a `No ConnectionProvider defined` error when the connection expires while the client consumer is polling is fixed. (SE-16727) ## [](#4-3-1)4.3.1 **July 14, 2020** ### [](#compatibility-51)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0
### [](#fixed-issues-45)Fixed Issues Fixed an issue where the value for the password key of the JAAS configuration was not set. (SE-16670) ## [](#4-3-0)4.3.0 **June 30, 2020** ### [](#compatibility-52)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0
### [](#new-features-2)New Features Added support for a SASL/PLAIN connection. ## [](#4-2-0)4.2.0 **June 19, 2020** ### [](#compatibility-53)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0, 2.5.0
### [](#new-features-3)New Features Added support for a Kerberos connection. ### [](#fixed-issues-46)Fixed Issues - Kafka Connector 4.1.0 did not allow you to pass `ssl.endpoint.identification.algorithm` with a blank value. (SE-16215) - Kafka Connector 4.0.0 had missing connection options. (SE-15175) ## [](#4-1-0)4.1.0 **May 28, 2020** ### [](#compatibility-54)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0
### [](#new-features-4)New Features - Added the SASL SCRAM connection type for connecting to a Kafka broker. This connection type works with the SCRAM-SHA-256 and SCARM-SHA-512 authentication mechanisms. - Added the Endpoint Identification Algorithm field to all connection types. Clients use this field to validate the server hostname. ### [](#fixed-issues-47)Fixed Issues - Inability to set additional properties in Kafka Connector 4.0.0 (SE-15197) ## [](#4-0-0)4.0.0 **February 25, 2020** ### [](#compatibility-55)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0
### [](#new-features-5)New Features Kafka Connector 4.0.0 contains a lot of changes to improve efficiency, including new operations to enable you to better understand how to use the connector. All of the changes included in this version break backward compatibility. See [Kafka Connector Upgrade](https://docs.mulesoft.com/kafka-connector/latest/kafka-connector-upgrade-migrate) for detailed information about all of the changes in this release. The new features and changes in this release include: - Four new operations, including: - Commit - Consume - Publish - Seek - A new Batch Message Listener source - The addition of different acknowledgment modes in the Consumer configuration, including: - AUTO - MANUAL - DUPS\_OK - IMMEDIATE - One plaintext connection type that supports transactions ## [](#3-0-12)3.0.12 **September 9, 2020** ### [](#compatibility-56)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.4.0
### [](#fixed-issues-48)Fixed Issues - Fixed a vulnerability related to the Guava library. - Kafka Connector versions 3.0.8 through 3.0.11 do not work with Mule 4.1.x, as previously stated by the documentation. (SE-17493) ## [](#3-0-11-deprecated)3.0.11 (Deprecated) **June 12, 2020** ### [](#compatibility-57)Compatibility
Software Version

Mule

4.2.1 and later

Apache Kafka

2.4.0
### [](#fixed-issues-49)Fixed Issues Changed the Scheduler type from cpuLight to IO. (SE-16328) ## [](#3-0-10-deprecated)3.0.10 (Deprecated) **December 17, 2019** ### [](#compatibility-58)Compatibility
Software Version

Mule

4.2.1 and later

Apache Kafka

2.4.0
### [](#fixed-issues-50)Fixed Issues - Updated Kafka Client version to the latest to prevent internal exceptions. (SE-14104) - Fixed Kafka consumer disconnection that occurred after a period of inactivity. (SE-14221) ## [](#3-0-9-deprecated)3.0.9 (Deprecated) **December 16, 2019** ### [](#compatibility-59)Compatibility
Software Version

Mule

4.2.1 and later

Apache Kafka

2.3.0
### [](#fixed-issues-51)Fixed Issues Fixed relative path issue for Kafka connector settings with Windows. (SE-14140) ## [](#3-0-8-deprecated)3.0.8 (Deprecated) **November 25, 2019** ### [](#compatibility-60)Compatibility
Software Version

Mule

4.2.1 and later

Apache Kafka

2.3.0
### [](#fixed-issues-52)Fixed Issues When `KafkaConsumer` was stopped by the Mule runtime engine, Kafka threw a concurrency error. (SE-13970) ## [](#3-0-7)3.0.7 **August 21, 2019** ### [](#compatibility-61)Compatibility
Software Version

Mule

4.1.1 and later

Apache Kafka

2.3.0
### [](#features-3)Features - Upgraded the Kafka Clients library to version 2.3.0. (CONN-2857) - Implemented validation method for producer and consumer connection. (CONN-2698) - Added Scheduler Service for spawning new threads for consumers. (CONN-2849) ### [](#fixed-issues-53)Fixed Issues - Refactoring to improve compliance with the Mule development best practices. (CONN-2699, CONN-2700, CONN-2701, CONN-2702, CONN-2848, CONN-2703, CONN-2847, CONN-2747, CONN-2696, CONN-2697) - Deprecated the UNKNOWN error type that will be removed in the next major upcoming release. (CONN-2703) - In Kafka versions 3.0.2 to 3.0.6, in the **Publish Message** operation, the **Key** field appeared in Anypoint Studio as required. In version 3.0.7, the **Key** field was no longer required. - In Kafka versions 3.0.2 to 3.0.6, in the **Message Consumer** source operation, the **Partition Offsets** field was described as "a list of offsets representing the partitions offsets configuration. For each element in the list you have to specify partition index and offset". In version 3.0.7, the **Partition Offsets** field is now described as "a list of objects that contain the index of the partition and the offset". - In Kafka versions 3.0.2 to 3.0.6, in the **Message Consumer** source operation, the **Partition Offsets** field is typed as an array of offsets. In 3.0.2 to 3.0.6 in the Offset array, the **Partition Number** and **Partition Offset** fields did not require values. In 3.0.7, the **Partition Number** and **Partition Offset** fields now require values. - In Kafka versions 3.0.2 to 3.0.6, in the **Repeatable File Store Stream** object, the **Max in Memory Size** field name was changed to be **In Memory Size** in 3.0.7. ## [](#3-0-6)3.0.6 **July 2, 2019** ### [](#compatibility-62)Compatibility
Software Version

Mule

4.0.0 and later

Apache Kafka

2.2.0
### [](#fixed-issues-54)Fixed Issues Kafka connector overrode the user-defined `security.protocol=SASL_SSL` to use the `security.protocol=SSL` value. (SE-11947) ## [](#3-0-5)3.0.5 **June 19, 2019** ### [](#compatibility-63)Compatibility
Software Version

Mule

4.0.0 and later

Apache Kafka

2.2.0
### [](#fixed-issues-55)Fixed Issues - Updated the Kafka Clients library to version 2.2.0. - Updated code to use the `poll(java.time.Duration)` method provided in the new library that replaces the deprecated `poll(long)` method. The deprecated method did not block beyond the timeout for waiting on a partition assignment. (KIP-266) ## [](#3-0-4)3.0.4 **May 16, 2019** ### [](#compatibility-64)Compatibility
Software Version

Mule

4.0.0 and later

Apache Kafka

0.10.2.0
### [](#fixed-issues-56)Fixed Issues Fixed a performance connection validation issue relating to the same issue as in v3.0.3. (SE-11817) ## [](#3-0-3)3.0.3 **May 16, 2019** ### [](#compatibility-65)Compatibility
Software Version

Mule

4.0.0 and later

Apache Kafka

0.10.2.0
### [](#fixed-issues-57)Fixed Issues - The **Test Connection** button in Anypoint Studio for the Kafka connector did not work in Mule 4. (SE-11817) - Fixed a performance connection validation issue relating to the same issue as in v3.0.3. (SE-11817) ## [](#3-0-2)3.0.2 **April 30, 2019** ### [](#compatibility-66)Compatibility
Software Version

Mule

4.0.0 and later

Apache Kafka

0.10.2.0
### [](#fixed-issues-58)Fixed Issues - Can’t stop Kafka consumer flow. See [How To Stop Or Start Flows In Mule 4.x Programmatically](https://help.salesforce.com/s/articleView?id=001114843&type=1). (SE-11337) - The **Test Connection** button in Anypoint Studio for the Kafka connector did not work in Mule 4. (SE-11817) ## [](#3-0-1)3.0.1 **June 26, 2018** ### [](#compatibility-67)Compatibility
Software Version

Mule

4.0.0 and later

Apache Kafka

0.10.2.0
### [](#features-4)Features None ### [](#fixed-issues-59)Fixed Issues Kafka connector was not serializing and deserializing properly the messages that were not plain text. Now the content of the messages can be sent as any type (plain, XML, JSON) as the value is serialized and deserialized properly. ## [](#see-also)See Also - [Salesforce Help](https://help.salesforce.com) - [MuleSoft Services](https://www.mulesoft.com/support-and-services) - [Known Issues](https://help.salesforce.com/s/issues)